biden spent the day in iowa, where he attacked ryan's budget plan. >> look, ryan saying that his budget doesn't cut-- it just slows-- is a little like romney standing in an unemployment line and saying to the unemployed guy, look, i want to make it clear to you: i didn't outsource your job; i just offshored your job. >> woodruff: in fact, today the candidates, their running mates, spouses and surrogates blanketed seven toss-up states around the country. former president bill clinton has hit the trail hard, appearing today in wisconsin and ohio on behalf of the president. >> but i am far more enthusiastic four years ago. >> woodruff: clinton was in minnesota earlier in the week, where the romney campaign recently announced a new ad buy. it's a place both sides had earlier assumed would belong to the democrats. the obama camp countered with a new ad featuring the endorsement of former secretary of state colin powell, ran it there and in nine other states. >> i think we ought to keep on the track that we're on. >> i'm barack obama and i approve this message. >> woodruff: but the romney cam